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arXiv · 1302.0268

Amplification of realistic cat-like states by homodyne heralding

Amine Laghaout·Jonas S. Neergaard-Nielsen·Ioannes Rigas·Christian Kragh·Anders Tipsmark·Ulrik L. Andersen
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Abstract

We present a scheme for the amplification of Schrodinger cats that collapses two smaller states onto their constructive interference via a homodyne projection. We analyze the performance of the amplification in terms of fidelity and success rate when the input consists of either exact coherent state superpositions or of photon-subtracted squeezed vacua. The impact of imprecise homodyne detection and of impure squeezing is quantified. We also assess the scalability of iterated amplifications.

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Amine Laghaout, Jonas S. Neergaard-Nielsen, Ioannes Rigas, Christian Kragh, Anders Tipsmark, Ulrik L. Andersen. 2013-01-31. Amplification of realistic cat-like states by homodyne heralding. https://doi.org/10.1103/physreva.87.043826

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